In-situ growth surface heat treatment process based on composite nitrided metal surface substrate

A surface heat treatment and metal surface technology, applied in the field of heat treatment, can solve the problems of high surface viscosity, low erosion resistance and poor wear resistance of stainless steel workpieces, and achieve good anti-corrosion and wear resistance, high impact resistance and erosion resistance of the workpiece. , The effect of good corrosion resistance

Active Publication Date: 2020-12-29
SHAANXI TIEMA FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon steel workpieces are extremely prone to corrosion and wear, and have a short service life, while stainless steel workpieces have a high surface viscosity and poor wear resistance
[0003] In order to solve the above-mentioned problems, the workpiece surface anti-corrosion and wear-resistant treatment technology is adopted in the related technology, such as adopting chrome-zinc electroplating layer, Dacromet coating (zinc-aluminum coating), zinc-nickel co-drilling coating, hot-dip galvanizing coating, plating Titanium-silver paint coating and other surface treatment processes, but the parts after the current process have low bonding force between the coating and the substrate, the coating is easy to fall off, the anti-corrosion and wear resistance is poor, the surface hardness is not high, impact resistance, resistance Problems such as low flushing performance

Method used

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  • In-situ growth surface heat treatment process based on composite nitrided metal surface substrate
  • In-situ growth surface heat treatment process based on composite nitrided metal surface substrate
  • In-situ growth surface heat treatment process based on composite nitrided metal surface substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The first step is to carry out liquid ion compound nitriding treatment on the workpiece, which may specifically include the following steps:

[0073] 1) The inner and outer surfaces of the workpiece are degreased, cleaned and dried; the outer surface is shot blasted and polished;

[0074] 2) Workpiece preheating treatment, place the workpiece in a resistance heating furnace for preheating, the preheating temperature is 200-450°C, and the time is 10-100min;

[0075] 3) Soaking treatment of the workpiece, the workpiece is heated evenly and kept warm in the medium frequency induction heating liquid ion nitriding furnace, and the soaking treatment of the workpiece is carried out, the temperature is 400-600 ° C, and the time is 10-120 minutes;

[0076] 4) Liquid ion nitriding treatment of the workpiece. The workpiece is heated in a medium-frequency induction heating liquid ion nitriding furnace at a temperature of 500-650°C for 10-120 minutes to form Fe2N, Fe3N, and Fe4N wit...

Embodiment 2

[0088] The first step is to carry out liquid ion compound nitriding treatment on the workpiece, which may specifically include the following steps:

[0089] (1) The inner and outer surfaces of the workpiece are treated, and the inner and outer surfaces of the workpiece are degreased, cleaned and dried; the outer surface is shot blasted and polished;

[0090] (2) Workpiece preheating treatment, place the workpiece in a resistance heating furnace for preheating, the preheating temperature is 200-450°C, and the time is 10-100min;

[0091] (3) Soaking treatment of the workpiece, the workpiece is heated evenly and kept warm in the medium frequency induction heating liquid ion nitriding furnace, and the soaking treatment of the workpiece is carried out, the temperature is 400-600°C, and the time is 10-120min;

[0092] (4) Liquid ion nitriding treatment of the workpiece. The workpiece is heated and nitrided in an intermediate frequency induction heating liquid ion nitriding furnace a...

Embodiment 3

[0106] The first step is to carry out liquid ion compound nitriding treatment on the workpiece, which may specifically include the following steps:

[0107] (1) The inner and outer surfaces of the workpiece are treated, and the inner and outer surfaces of the workpiece are degreased, cleaned and dried; the outer surface is shot blasted and polished;

[0108] (2) Workpiece preheating treatment, place the workpiece in a resistance heating furnace for preheating, the preheating temperature is 350°C, and the time is 60min;

[0109] (3) Soaking treatment of the workpiece, the workpiece is heated evenly and kept warm in the medium frequency induction heating liquid ion nitriding furnace, and the soaking treatment of the workpiece is carried out, the temperature is 500 ° C, and the time is 60 minutes;

[0110] (4) Liquid ion nitriding treatment of the workpiece. The workpiece is heated and nitrided in an intermediate frequency induction heating liquid ion nitriding furnace at a tempe...

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Abstract

The invention relates to an in-situ growth surface heat treatment process based on a composite nitriding metal surface base. The in-situ growth surface heat treatment process comprises the steps thatliquid ion composite nitriding treatment is carried out on a to-be-treated workpiece so as to form an anti-corrosion and wear-resisting compound layer structure on the surface of the workpiece; the compound layer structure comprises a nitride structure, a carbide structure and an oxide structure; and the workpiece subjected to nitriding treatment is subjected to zinc-nickel-nitrogen-oxygen in-situcomposite growth treatment so as to form an anti-corrosion and wear-resisting layer on the surface of the workpiece. The binding force of a diffusion layer on the surface of the workpiece treated through the process and a matrix is high, falling off is not prone to happening, the anti-corrosion performance and wear resistance of the workpiece are good, surface hardness is high, and high impact resistance and washing resistance are achieved.

Description

technical field [0001] The present disclosure relates to the technical field of heat treatment, in particular to an in-situ growth surface heat treatment process based on a composite nitrided metal surface base. Background technique [0002] The currently widely used civil construction and industrial workpieces are mostly carbon steel workpieces and stainless steel workpieces. Carbon steel workpieces are extremely prone to corrosion and wear, and have a short service life, while stainless steel workpieces have a high surface viscosity and poor wear resistance. [0003] In order to solve the above-mentioned problems, the workpiece surface anti-corrosion and wear-resistant treatment technology is adopted in the related technology, such as adopting chrome-zinc electroplating layer, Dacromet coating (zinc-aluminum coating), zinc-nickel co-drilling coating, hot-dip galvanizing coating, plating Titanium-silver paint coating and other surface treatment processes, but the parts aft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/50C23C8/80C23C10/52C23C28/00
CPCC23C8/50C23C8/80C23C10/52C23C28/321C23C28/34
Inventor 何养民何智俊
Owner SHAANXI TIEMA FORGING
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